rust 编译ios静态库

1. 安装交差编译的targets

rustup target list

两个环境，真机与模拟器

x86_64-apple-ios

aarch64-apple-ios

2.安装lipo

cargo install cargo-lipo

3.编写代码

use num::{BigInt, ToPrimitive};
#[no_mangle]
pub extern fn get_rand_key(p: u32) -> u32 {
    //随机一个小于P的数最为私钥
    return rand::random::<u32>() % (p - 1);
}
#[no_mangle]
pub extern  fn get_public_key(g: u32,p: u32,pub_key: u32) -> i32 {
    return match BigInt::from(g).modpow(&BigInt::from(pub_key), &BigInt::from(p)).to_i32() {
        Some(n) =>n,
        None => -1
    };
}

#[no_mangle]
pub extern fn get_private_key(p: u32,pub_key:i32,rand: u32)->i32{
   return match BigInt::from(pub_key).modpow(&BigInt::from(rand), &BigInt::from(p)).to_i32() {
       Some(n) => n,
       None => -1
   };
}

4.cargo.toml配置

[package]
name = "dh-lib"
version = "0.1.0"
authors = ["sorata"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
rand = "0.7.3"
num = "0.2.1"


[lib]
name = "ff"
crate-type = ["staticlib", "cdylib"]

5.编译

cargo lipo --release

6.合并静态库

lipo -create /Users/cocos/software/github/dh-lib/target/x86_64-apple-ios/release/libff.a  /Users/cocos/software/github/dh-lib/target/aarch64-apple-ios/release/libff.a -o cc.a

7.头文件

//
//  Header.h
//  dh
//
//  Created by sorata on 2020/4/21.
//  Copyright © 2020 sorata. All rights reserved.
//

#ifndef Header_h
#define Header_h
//创建私钥
int get_rand_key(int p);
//创建公钥
int get_public_key(int g,int p,int pub_key);
//交换得到共享密钥
int get_private_key(int p,int pub_key,int rand);


#endif /* Header_h */

 

来源：oschina

链接：https://my.oschina.net/swiftloop/blog/3301177